Non-convulsive status epilepticus as cause for focal neurological deficit.

In a four-and-a-half year period, 19 patients with focal neurological deficits accompanied by a focal electrographic status epilepticus were encountered. Sixteen of these patients showed clouding of consciousness or confusion. Computed tomography of the brain revealed focal lesions in 15 patients. In 7 patients the lesions were the result of a recent cerebral event and in 8 patients they were long-standing. All patients were treated with anti-epileptic drugs. Ten of the 12 patients without an acute lesion showed a complete recovery in a few days. In these patients the symptoms may have been caused by the continuous seizure activity, classifying them as cases of non-convulsive focal status epilepticus. Only 2 of the 7 patients with an acute lesion had a full recovery. In patients with an acute lesion the part played by the electrographic status epilepticus in the acquired deficits is unclear. Continuous or frequent intermittent focal epileptic discharges on the EEG may warrant treatment with anti-epileptic drugs in patients with focal neurological deficits, even when one of the hallmarks of epilepsy, clonic movements, is absent.